News Details
Hydrophilic crosslinking agent for wood coatings
2017-8-26 10:36:43
Hydrophilic crosslinking agent for wood coatings
Hydrophilic crosslinking agent is added in the wood coatings: although one-component aqueous dispersions provides the required performance, by adding hydrophilic crosslinking agent, the chemical media resistance, adhesion, or other may further improve the performance.
Hydrophilic crosslinking agents have several kinds of chemicals to choose from - polyazol-polycyclic propane, polycarbonized diylamine and water-dispersible polyisocyanates.
The polyazothane and polycarbonized diylamine provide the properties of dispersive and low viscosity, but are sensitive to the pH value and must be cross-linked with the acid functional groups respectively.
The first generation of polyisocyanate has been modified by hydrophilic modification, thus providing easy dispersibility.This option is usually low in isocyanate content and has high viscosity.
The second generation of isocyanates is solvent-free and ion-modified, and is another patented technology.One of the advantages of this technique is that the isocyanate content is high (23%) and the viscosity is very low, so that it can be prepared with ultra-low VOC coating.
It is important to keep in mind that this helps ensure optimum formulation of paint and should consider the polyurethane dispersion and end-use when selecting crosslinking agents.
The researchers conducted a black heel print (BHMR) test, which was used to evaluate whether a shoe print could be removed, which is an important test for wood flooring.Wear resistance is also important for this purpose (Taber abrasion test).They should also be hard enough, because if the coating is soft, the dust will suck in, leading to unwanted dirty marks.
Chinese name: Diethyl toluene diamine(DETDA)
Hydrophilic crosslinking agent is added in the wood coatings: although one-component aqueous dispersions provides the required performance, by adding hydrophilic crosslinking agent, the chemical media resistance, adhesion, or other may further improve the performance.
Hydrophilic crosslinking agents have several kinds of chemicals to choose from - polyazol-polycyclic propane, polycarbonized diylamine and water-dispersible polyisocyanates.
The polyazothane and polycarbonized diylamine provide the properties of dispersive and low viscosity, but are sensitive to the pH value and must be cross-linked with the acid functional groups respectively.
The first generation of polyisocyanate has been modified by hydrophilic modification, thus providing easy dispersibility.This option is usually low in isocyanate content and has high viscosity.
The second generation of isocyanates is solvent-free and ion-modified, and is another patented technology.One of the advantages of this technique is that the isocyanate content is high (23%) and the viscosity is very low, so that it can be prepared with ultra-low VOC coating.
It is important to keep in mind that this helps ensure optimum formulation of paint and should consider the polyurethane dispersion and end-use when selecting crosslinking agents.
The researchers conducted a black heel print (BHMR) test, which was used to evaluate whether a shoe print could be removed, which is an important test for wood flooring.Wear resistance is also important for this purpose (Taber abrasion test).They should also be hard enough, because if the coating is soft, the dust will suck in, leading to unwanted dirty marks.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packingļ¼ net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
One of the key properties of the kitchen cabinet is the chemical resistance (dye).The main test for the market, developed by the manufacturers' association (KCMA), is to expose the coating to such media as mustard, coffee and vinegar.After a period of time, the media is removed to see if it will stain.For kitchen cabinets, it is also important to have excellent abrasion resistance (Taber abrasion test) and excellent pollution resistance (pendulum stiffness).
Excellent resistance to pollution (pendulum bar hardness), abrasion resistance (Taber wear resistance test) and water resistance (water drop) are the most important properties of furniture coatings.In addition, excellent resistance to chemical media (stain), such as resistance to shoe polish, nail polish, soft drinks and other medium in office environment often see also to identify as the important judgment standard office furniture coatings.
In addition to excellent water resistance and chemical resistance, good anti-adhesion time is also an important consideration for indoor Windows and doors.
As expected, excellent weatherability - including good protection of light, no fragmentation, no powder, no burst or yellowing - is the most important for the outdoor wood paint market.
The type of polyurethane dispersion (PUDs).Polyurethane dispersions have main components or groups: polyether, polyester and polycarbonate.Polyurethane dispersion is sometimes prepared with two main components.It may contain the advantages and disadvantages of each component.
There are some self-crosslinked polyurethane dispersions.These dispersions contain linked segments that can be crosslinked.Some types of self-crosslinking materials contain fatty acid chains that make them oxidize over time.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
One of the key properties of the kitchen cabinet is the chemical resistance (dye).The main test for the market, developed by the manufacturers' association (KCMA), is to expose the coating to such media as mustard, coffee and vinegar.After a period of time, the media is removed to see if it will stain.For kitchen cabinets, it is also important to have excellent abrasion resistance (Taber abrasion test) and excellent pollution resistance (pendulum stiffness).
Excellent resistance to pollution (pendulum bar hardness), abrasion resistance (Taber wear resistance test) and water resistance (water drop) are the most important properties of furniture coatings.In addition, excellent resistance to chemical media (stain), such as resistance to shoe polish, nail polish, soft drinks and other medium in office environment often see also to identify as the important judgment standard office furniture coatings.
In addition to excellent water resistance and chemical resistance, good anti-adhesion time is also an important consideration for indoor Windows and doors.
As expected, excellent weatherability - including good protection of light, no fragmentation, no powder, no burst or yellowing - is the most important for the outdoor wood paint market.
The type of polyurethane dispersion (PUDs).Polyurethane dispersions have main components or groups: polyether, polyester and polycarbonate.Polyurethane dispersion is sometimes prepared with two main components.It may contain the advantages and disadvantages of each component.
There are some self-crosslinked polyurethane dispersions.These dispersions contain linked segments that can be crosslinked.Some types of self-crosslinking materials contain fatty acid chains that make them oxidize over time.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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